John Deere Standard
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JDM F22
Specification for Mechanically Deposited Zinc
Coatings
Table of Contents
1
Scope ................................................................................................................................................... 3
2
Terms and Definitions .......................................................................................................................... 3
3
General Requirements ......................................................................................................................... 4
4
Zinc Coating Thickness ........................................................................................................................ 5
5
Zinc Coating Adhesion ......................................................................................................................... 5
6
Freedom from Hydrogen Embrittlement ............................................................................................... 5
7
Appearance .......................................................................................................................................... 5
8
Conversion Coating .............................................................................................................................. 6
9
Corrosion Protection ............................................................................................................................. 6
10
Coefficient of Friction Requirements .................................................................................................... 7
11
Designation for Enterprise Standard Parts ........................................................................................... 7
12
Designations for JDM F22 Parts Using Minimum Zinc Coating Thickness of 8 µm............................. 7
13
Designations for JDM F22 Parts Using Specific Zinc Coating Thickness Specification ...................... 7
14
Quality Assurance Requirements for Purchased Components ............................................................ 8
15
Information Necessary on Production Part Approval Process (PPAP) ................................................ 8
16
Lot Documentation ............................................................................................................................... 8
17
References ........................................................................................................................................... 9
Summary of Changes from Previous Edition
(For Information Only — Not Part of the Standard) ............................................................................ 11
Current edition:
2018-01-04
Supersedes:
2012-01-20
First issued:
2012-01-20
Design Control: DT
Page 1 of 11
John Deere Standards are intended for use by Deere & Company, its divisions and subsidiaries. Suppliers who rely on them in
furnishing products to or for the benefit of the Company must determine that they are in possession of the latest version. Distribution
of the standards to parties other than John Deere Suppliers, whether with or without charge, are for information only and
Deere & Company disclaims all responsibility for results attributable to the application of or compliance with such standards. The
Company makes no representation, express or implied, that conformity ensures compliance with applicable law or other rules or
regulations. Further, those who are in receipt of and elect to use the standards, agree to assume the responsibility for compliance with
patents, as well as potential patent infringement.
Deere & Company Engineering Standards Department, One John Deere Place, Moline, Illinois 61265-8098, U.S.A. Unpublished —
All rights reserved under the copyright laws.
JDM F22
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List of Tables
Table 1
JDM F22 Coating Thickness Options ......................................................................................... 5
Table 2
Conversion Coatings Permitted by JDM F22 .............................................................................. 6
Table 3
Neutral Salt Spray Resistance for JDM F22 Coatings As Processed ........................................ 6
Table 4
Neutral Salt Spray Resistance for JDM F22 Coatings As Received .......................................... 7
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1
JDM F22
Scope
1.1
JDM F22 specifies the requirements for a colorless or black appearance, hexavalent chromium-free,
mechanically deposited zinc coatings with a 0.14-0.22 coefficient of total friction (CoF) requirement.
1.2
JDM F22 is considered high Coefficient of Friction (0.14-0.22) and is not part of the low Coefficient
of Friction (0.09-0.16) series of standards that include JDM F25, JDM F26, and JDM F27. JDM F22
Coefficient of Friction is 0.14-0.22 regardless of color appearance.
1.3
JDM F22 applies to non-threaded parts and fasteners made of steel such as solid pins, washers,
spring pins, and snap rings.
1.4
JDM F22 is not intended for threaded parts due to the potential for embedment of media within the
threads as well as the deformation potential of threads.
1.5
JDM F22 is specified in terms of ISO 12683. JDM F22 is a performance specification, allowing the
supplier to determine the best composition of the coating to meet the JDM F22 requirements.
1.6
JDM F22 does not specify the surface condition of the base metal prior to coating.
1.7
The friction characteristics of the JDM F22 designations are specified by coefficient of friction. For a
critical joint that will be tightened by torque control, it is recommended that a torque/tension study of the
actual fastener joint, or a simulation of it, be performed to determine the appropriate tightening torque.
This standard can contain mandatory provisions, which are identified by the words “shall” or
“required”. Compliance with the mandatory provisions is required to claim conformance with this standard.
This standard can also contain guideline provisions, which are generally identified by the words “should” or
“recommended”. Compliance with the guideline provisions is not required, because they might not be
appropriate for all machines or all applications.
1.8
2
Terms and Definitions
For the purposes of JDM F22, the terms and definitions in ISO 12683 and the following apply.
2.1
as processed
Supplier provided results of neutral salt spray (NSS) testing of samples collected at the supplier’s
manufacturing facility at least 24 hours after conversion coating treatment process.
2.2
as received
Neutral salt spray (NSS) testing of samples collected after arrival at John Deere.
Note 1
The as-received NSS value takes into account handling degradation of the JDM F22 coating on the part.
2.3
base metal corrosion
Visual corrosion of the base metal, often referred to as “red corrosion” or “red rust” on steel fasteners
2.4
colorless conversion coating
Conversion coating with the appearance of a transparent, to clear with possible bluish hue, slight
iridescence is acceptable. Colorless layer applied such that the underlying coating is seen through the
conversion coating on the finished product.
3
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2.5
conversion coating
Layer on the surface of the electroplated zinc formed when the exposed zinc surface chemically reacts with
a solution and is converted to a chemical compound of the zinc and an anion of the solution to which it has
been exposed.
2.6
enterprise standard part
Part owned by Enterprise Engineering Standards which does not require a drawing.
2.7
fastener
Part that transfers load by joining two or more parts, with or without the use of threads.
Note 2
Parts are considered to be fasteners if they are covered by ISO 1891 with the inclusion of snap rings.
Examples of fasteners include bolts, screws, nuts, weld nuts, flat washers, spring washers, split pins, and blind rivets.
2.8
non-fastener
Part whose function is not primarily for joining two or more parts.
Note 3
Parts are considered to be non-fasteners if they are not covered by ISO 1891. Examples of non-fastener
parts include tubing, brackets, pulleys, and tie rods.
2.9
sacrificial coating corrosion
Visual corrosion of the zinc coating, often referred to as “white corrosion” or “white rust”, which typically
occurs prior to base metal corrosion.
2.10
significant surface
Surface on which the specified zinc coating thickness applies, includes all surfaces of the part other than
screw threads that are normally visible, directly or by reflection, and that can be touched by a 20 mm
diameter ball.
2.11
supplementary treatment
Any surface treatment, including organic or inorganic sealing agents, applied in addition to the conversion
coating in order to enhance corrosion protection or other coating properties.
3
3.1
General Requirements
JDM F22 coatings shall be compliant to ISO 12683 with the additions or exclusions of JDM F22.
3.2
Unless otherwise specified, JDM F22 coated parts shall have an ISO 12683 Type 2 supplementary
coating finish, except the color appearance shall be colorless or black as designated in JDM F22 Table 2.
3.3
All part dimensions shall apply after coating.
3.4
JDM F22 coatings shall be compliant to JDM H30. The presence of hexavalent chromium shall be
tested in accordance with ISO 3613. A statement identifying the part is free from hexavalent chromium (see
clause 8) shall be provided during PPAP.
4
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4
Zinc Coating Thickness
4.1
Unless otherwise specified, zinc coating thickness shall be determined by the supplier based on the
dimensional and performance requirements of the part, with a minimum coating thickness of 8 µm. The
coating thickness shall be adequate to provide the corrosion resistance specified in Table 3.
Note 4
8 µm coating thickness is a minimum. The supplier can decide to use additional zinc to increase the thickness
in order to meet the performance requirements, as long as dimensional requirements are maintained.
4.2
Significant surfaces shall be visibly coated. Measurements for minimum zinc coating thickness
applies to the local thickness at all points on significant surfaces.
4.3
Zinc coating thickness shall be measured by a method listed in ISO 12683. In case of dispute, the
method given in ISO 3497 shall be decisive.
4.4
Coating thickness options permitted in prior revisions of JDM F22 are considered not for new design,
as shown in Table 1.
Table 1
5
JDM F22 Coating Thickness Options
ISO Class
John Deere
Designation
Coating Thickness
(m)
Current Status
Zn 40 M(Fe)
5
40
Not for New Design
Zn 25 M(Fe)
4
25
Not for New Design
Zn 12 M(Fe)
3
12
Not for New Design
Zn 8 M(Fe)
2
8
Available
Zn 6 M(Fe)
1
6
Not for New Design
Zinc Coating Adhesion
5.1
Adhesion of the zinc coating to the base metal shall be such that there is no blistering, lifting or
peeling of the zinc coating.
5.2
6
JDM F22 coating adhesion shall be tested in accordance with ISO 12683.
Freedom from Hydrogen Embrittlement
JDM F22 parts shall be free from hydrogen embrittlement, including springs and other high strength parts
subject to flexure. High strength parts are considered 39 HRC or higher.
7
Appearance
7.1
JDM F22 coating appearance shall conform to ISO 12683.
7.2
JDM F22 limits the color appearance options to colorless or black as indicated in clause 8.3.
Note 5
Black is not recommended for new designs due to the convention of black color indicating low coefficient of
friction and JDM F22 is high coefficient of friction. Additionally, the black mechanical plating has poor aesthetic
appearance.
5
JDM F22
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Conversion Coating
8.1
Parts with an “A” designation shall be colorless and shall not contain hexavalent chromium.
8.2
Parts with an “E” designation shall be black color and shall not contain hexavalent chromium.
8.3
Table 2 shows the conversion coatings permitted by JDM F22.
Table 2
9
Conversion Coatings Permitted by JDM F22
Designation
Color Appearance Description
A
Colorless
E
Black (Not for New Design)
Corrosion Protection
9.1
All tests, including accelerated corrosion testing, shall be carried out at least 24 hours after
conversion coating treatment process.
9.2
Unless otherwise specified, the significant surfaces shall show neither sacrificial coating corrosion
products (except at corners or edges) nor base metal corrosion at the end of continuous neutral salt spray
according to ISO 9227 or ASTM B117 for the respective test times specified in Table 3 when inspected with
the unaided eye at normal reading distance.
9.3
Unless otherwise specified, only those surfaces of the part that are positioned in the test chamber in
accordance with the specified test method are pertinent for evaluating results.
9.4
Each lot of JDM F22 parts shall meet or exceed the As Processed NSS corrosion protection
requirements in Table 3. The test report shall be provided during Production Part Approval Process (PPAP)
and subsequently available upon request.
Table 3
Neutral Salt Spray Resistance for JDM F22 Coatings As Processed
Neutral Salt Spray Resistance, Minimum Test Time
9.5
Designation
Sacrificial Coating Corrosion
Base Metal Corrosion
A
48 h
96 h
E
48 h
96 h
Table 4 is provided for John Deere internal use and is not an attribute for rejection of supplier parts.
9.6
Table 4 acknowledges the known plating industry phenomena of material handling degradation.
Table 4 should be used as a reference when performing NSS testing on samples located at John Deere.
Parts that do not meet Table 4 values are indicative of excessive material handling, providing evidence for
efficiency improvement opportunities.
6
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Table 4
Neutral Salt Spray Resistance for JDM F22 Coatings As Received
Neutral Salt Spray Resistance, Minimum Test Time
Designation
Sacrificial Coating Corrosion
Base Metal Corrosion
A
24 h
48 h
E
24 h
48 h
9.7
A supplementary treatment may be used in addition to the conversion coating to meet the required
corrosion resistance, or coefficient of friction requirement in the event of washers, provided that the coating
with the supplementary treatment meets all specified requirements. Documentation shall be provided
through Product Part Approval Process to John Deere regarding the type of supplementary treatment used,
if any.
Note 6
Use of certain supplementary treatments can affect subsequent paint adhesion.
10 Coefficient of Friction Requirements
JDM F22 coated washers shall comply with the coefficient of friction requirements specified in JDM F15,
including the permission to monitor on a manufacturing process basis instead of lot basis when using one
of the detection methods specified in JDM F15.
11 Designation for Enterprise Standard Parts
The specific designation for a standard part can be found on the GetSpecCallout within RECON. The
JDM F22 coating specification may be integrated within a John Deere parts family standard, if available, or
may be designated directly within the specification.
Example
24M7348
JDS 130 – 5.5 X 10 X 1 – 300HV – Mechanical Zinc – JDM F22 A
12 Designations for JDM F22 Parts Using Minimum Zinc Coating Thickness of
8 µm
12.1
JDM F22 may be specified on drawings.
Example is a designation of a mechanically deposited zinc coating with an 8 μm minimum zinc
coating thickness, with colorless conversion coating with or without supplementary treatment:
12.2
Example
PLATING PER JDM F22 A
13 Designations for JDM F22 Parts Using Specific Zinc Coating Thickness
Specification
13.1
A drawing shall be created for parts where a specific zinc coating thickness specification other than
8 μm is needed. JDM F22 may be specified on the drawing to require compliance to all portions of this
standard with the noted exception of zinc coating thickness as stated on the drawing.
13.2 Example is a designation of a mechanically deposited zinc coating with 12 µm minimum coating
thickness and a colorless conversion coating with or without supplementary treatment:
Example
JDM F22 Zn 12 M(Fe) A
7
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14 Quality Assurance Requirements for Purchased Components
The supplier shall pursue a program for continuous improvement with the goal of process capability as
outlined in the JDS-G223.
15 Information Necessary on Production Part Approval Process (PPAP)
The supplier shall provide the following items on the PPAP report:
 Identification of the required JDM F22 plating designation for the part.
 A statement identifying coating type.
 A statement identifying zinc coating thickness test method, the standard to which the part was
tested, quantitative data, and clear indication of pass or fail results.
 A statement identifying zinc coating adhesion test method, the standard to which the part was
tested, a statement identifying test results, and clear indication of pass or fail results.
 For high strength steels, provide a detailed description of preventive measures taken to mitigate
hydrogen embrittlement, including cleaning processes and delayed flexure.
 A statement of conversion coating color appearance and identification of conversion coating type.
 A statement identifying NSS test method, the standard to which the part was tested, and as
processed NSS data values with clear indication of appearance of sacrificial coating corrosion
and base metal corrosion.
 For washers, torque tension results in accordance with ISO 16047, including coefficient of friction
total, coefficient of friction between threads, coefficient of friction between bearing surfaces and
the torque values at the test clamp force of 36100 N. Ensure the calculation for Db is included in
accordance with ISO 16047.
 If applicable, documentation identifying any supplementary treatments applied to the part.
16 Lot Documentation
The supplier shall complete the following test on each lot in accordance with JDQ 88:
 Coating Thickness Test
 Neutral Salt Spray Test
 Coefficient of Friction Test, for washers only
Note 7
Monitoring Coefficient of Friction is possible on a manufacturing process basis as stated in clause 10.
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JDM F22
17 References
For undated references, the latest edition of the referenced document (including any amendments) applies.
17.1 Access to John Deere Standards
17.1.1 John Deere Standards can be accessed by John Deere personnel via the Engineering Standards
internal website.
17.1.2 Employees of suppliers with an approved John Deere supplier number can obtain access to
John Deere Standards via the JD Supply Network (JDSN). Access to JDSN is by approved individual name
and password. Suppliers should contact their Supply Management representative with questions about
JDSN.
Note 8
Only John Deere Standards which have been approved for supplier distribution are available via JDSN.
17.2 Access to Standards from External Organizations
17.2.1 Most standards from organizations external to John Deere are available to John Deere personnel
via the Engineering Standards internal website.
17.2.2 Suppliers are responsible for obtaining relevant external standards. In accordance with copyright
laws and Company policy, John Deere personnel shall not provide copies of these standards to suppliers.
17.3 References Cited in This Standard
17.3.1 John Deere Standards
JDM F15
Electroplated Zinc Coatings — Specification for Fasteners
JDM F25
Specification for Zinc Flake Coatings for Bolted Joints
JDM F26
Specification for Zinc Nickel Coating for Bolted Joints
JDM F27
Specification for Microcrystalline Zinc Phosphate and Oil Coating for Bolted
Joints
JDQ 88
Fastener Quality Assurance
JDS-G223
Supplier Quality Manual
17.3.2 ASTM Standards (ASTM International)
ASTM B117
Standard Practice for Operating Salt Spray (Fog) Apparatus
17.3.3 ISO Standards (International Organization for Standardization)
ISO 1891
Fasteners — Terminology
ISO 3613
Metallic and other inorganic coatings — Chromate conversion coatings on zinc,
cadmium, aluminium-zinc alloys and zinc-aluminium alloys — Test Methods
ISO 3497
Metallic Coatings — Measurement of Coating Thickness — X-ray Spectrometric
Methods
ISO 9227
Corrosion Tests in Artificial Atmospheres — Salt Spray Tests
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JDM F22
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ISO 12683
Mechanically Deposited Coatings of Zinc — Specification and Test Methods
ISO 16047
Fasteners Torque/Clamp Force Testing
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JDM F22
A
Summary of Changes from Previous Edition
(For Information Only — Not Part of the Standard)
Added clause 1.1 through clause 1.6 to add clarity to the scope for the benefit of users.
Added clause 1.8 for new text about mandatory and guideline provisions.
Added clause 2 for terms and definitions.
Revised clause 3.2 to state specifically the use of colorless or black color appearance.
Added clause 3.3 to clarify part dimensions apply after coating.
Added clause 3.4 for compliance to JDM H30.
Revised clause 4 for coating thickness with the intention of using only designation ‘2’ in the future. All
other designations were deemed not for new design.
Added clause 5.
Revised clause 6 to keep the requirement of all parts to be hydrogen embrittlement free, yet added the
test requirement for high strength parts.
Added clause 7 for appearance discussion
Revised clause 8 to indicate black color appearance is not for new design.
Added Table 3 and Table 4 to introduce concepts of As Processed NSS Hours and As Received NSS
Hours.
Revised clause 11 through clause 13 regarding designations to be in alignment with RECON.
Added clause 14 for quality assurance.
Added clause 15 for clarity to suppliers for items to provide during PPAP submission.
Added clause 16 for clarity on lot documentation requirements.
11